Question

Find an equation of the line that passes through the point and has the indicated slope m. (Let x be the independent variable and y be the dependent variable.) (2, 1); m = −1

Answer 1

im not sure what you mean... is that y=mr+c?

Answer 2

m is slope, and given a point (x1,y1) = (2,1)
the alternative way is use the formula :

now, just subtitute of them to formula above ^